Comparative Analysis of the Vulnerable Period of Groundwater Level Drawdown

This study selected groundwater level as the factor to represent the changes in groundwater resources and developed an evaluation method for the management of monthly groundwater level considering the temporal variability with the target of 9 sub-basins located in the Namwon. For the evaluation of vulnerable period in the groundwater level considering the influence of rainfall on the underground aquifer, the following methods were used: applying effective rainfall amount based on the application of rainfall data, and using rainfall data with the notion of critical infiltration, among which vulnerable periods were compared for evaluations. A standard was developed for evaluating groundwater level; the weighting values were determined by using the entropy method, and the vulnerability period of groundwater resources of each sub-basin was evaluated via multiple decision-making methods. The methods developed in this study are expected to make grounds for building measures for the effective spatiotemporal management of groundwater resources.